/Engine/Source/Runtime/Media/Public/IMediaPlayer.h
OnOpenFailed
bool Open ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [FArchive](API\Runtime\Core\Serialization\FArchive), ESPMode::ThreadSafe > & Archive, const [FString](API\Runtime\Core\Containers\FString) & OriginalUrl, const [IMediaOptions](API\Runtime\Media\IMediaOptions) * Options )